Science!!

• Which force is applied by objects is contact with each other?

  contact force
• What force is when two forces are acting on an object are equal in size but act in opposite directions?

  Balanced force
• If the force on an object are unbalanced the object is said to have a?

  unchanging motion
• What is the push or pull on an object when it interacts with another object?

  Force
• Two objects must be touching to create what force?

  contact force
• A what is exerted by an engine?

  thrust
• What can thrust be exerted by?

  car engines, airplanes and boats
• Tension is exerted through what?

  ropes, strings and wires
• What is exerted by ropes, string and wires?

  Tension
• What is exerted when an object moves through water?

  water resistance
• Water resistance is exerted by what?


  an object moving through water
• Air resistance is exerted By?

  when an object moves through the air
• What is exerted when an object moves through the air?

  air resistance
• Friction is exerted when?

  when objects try to slide over eachother
• What is exerted when objects try to slide past / over eachother?

  Friction
• Lift is exerted on a what?

  an airplane in an upwards direction
• What is exterted when on an airplane in an upwards direction?

  lift
• Upthrust is exerted on a what?

  an object in liquid
• What is exerted on an object in a liquid?

  upthrust
• Gravity is exerted by?

  any object with a mass
• what is exerted by an object with a mass?

  gravity
• Magnetic force is exerted on?

  magnetic materials or magnets
• What is exerted on magnetic materials or magnets?

  Magnetic force.
• What are 3 examples of contact forces?

  friction, tension, and air resistance
• The greater the wait the greater the what?

  pressure
• The smaller the surface area the what the pressure?

  greater
• Pressure=Force divided by surface area.
• N/M2=N/m2 .
• What object regains its shape when the forces deforming it are removed?

  Elastic object
• What is an elastic object?

  an object that regains its shape when the forces deforming it are removed.
• forces=Spring constant x extension
• What is hypothesis?

  The more force applied, the longer the extension of the spring.
• What is an independant variable?

  The variable changed by the investigator
• What is a control variable?

  a variable you keep the same
• What is a dependent variable?

  a variable that depends on the variable
• The force applied by an object per unit of area.
• Density=mass divided by volume
• Do lower density objects float or sink in higher density’s?

  float
• The bigger the difference of density the?

  larger the force of upthrust.
• What would happen if u wrapped a wire into a series of coils, their fields add together, so you would get?

  a really strong magnet called a solenoid magnet.